# chem

The following equation describes the oxidation of an acidified solution of sodium oxalate (Na2C2O4) by potassium permanganate(KMnO4)

5C2O4 + 2MnO4 + 16H2SO4 --> 10CO2 + 2Mn + 16HSO4 + 8H20

What volume of 0.127M sodium oxalate in sulphuric acid will react with 3.57g of potassium permanganate?

1. Convert 3.57 g KMnO4 to moles. mols = grams/molar mass.
Using the coefficients in the balanced equation, convert mols KMnO4 to mols Na2C2O4.
molarity Na2C2O4 = mols/L. YOu know mols from the above calculation, you know M, calculate volume.
Post your work if you get stuck.

posted by DrBob222
2. 0.071L

posted by MSingh
3. M KMnO4 = 158.0339g/mol

1 mol
3.57g X -----------------
158.0339g KMnO4
5 mol C2O4-
= 0.02259009 mol KMnO4 X -------------
2 mol KMnO4

1 L
=0.056475225 mol C2O4-X ---------------
0.127 mol C2O4-

= 0.445 L

posted by Dr. E
4. Woops sorry about the spacing. I didn't realize it would come out like that. Hope you can read it.

posted by Dr. E

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